【单选题】在衡量宏观经济增长情况时,GNP指的是______。
【单选题】The price on this packet is wrong. It says $65 but it ___________ $50.
【单选题】The price on this packet is wrong. It says $65 but it __________ $50.
【单选题】在衡量宏观经济增长情况时,GNP指的是〔)。
【单选题】The price on this packet is wrong. It says $50 but it _______ $45.
【单选题】The price on this packet is wrong. It says $65 but it ____ $50.
【单选题】关于元素性质的递变规律的下列说法,不正确的是( )
A.
元素周期表中,同一主族,随着电子层数的增加,元素的第一电离能逐渐增大
B.
同一周期中,主族元素的电负性,从左到右逐渐增大
C.
元素性质的周期性变化是因为原子核外电子排布的周期性变化
【单选题】It costs a company $50,000 to produce 5000 beach towels. The company’s cost will be $50,009 if it produces an additional beach towel. If the company produces 5,000 beach towels then
A.
its average cost is greater than its marginal cost.
B.
its average cost and its marginal cost are equal.
C.
its average cost is less than its marginal cost.
D.
there is insufficient information to compute average and marginal costs.
【单选题】药品不良反应报告和监测是指
B.
药品经营企业对本单位经营的药品所发生的不良反应进行分析和报告的过程
C.
医疗机构对使用的药品所发生的不良反应进行分析、监测的过程
D.
有配伍禁忌的药品联合使用发省的有害的药物互相作用
【单选题】下列说法正确的是 [ ]
A.
ⅠA族元素的金属性一定比ⅡA族元素的金属性强
D.
第三周期主族元素的离子半径,从左到右逐渐减小